← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 739 · 40 questions
TalentJR

The method (Round, then calculate): Round each number to the nearest ten, hundred or whole number. Do the easy sum with the rounded numbers. Pick the option nearest to it. To round a number, look at the digit after the place you keep: 5 or more goes up, less than 5 stays.

NameDateTime takenScore ___ / 40
  1. 1.Round 96461 to the nearest ten.
  2. 2.Which is closest to 3205 ÷ 41? (a) 40 (b) 800 (c) 80 (d) 160
  3. 3.Round 44.22 to one decimal place. =
  4. 4.Round 3620 to the nearest thousand.
  5. 5.Round 56238 to the nearest thousand.
  6. 6.Round 95.46 to one decimal place. =
  7. 7.Round 48353 to the nearest thousand.
  8. 8.Which is closest to 705 + 700 + 201? (a) 1500 (b) 1700 (c) 1800 (d) 1600
  9. 9.Round 84453 to the nearest thousand.
  10. 10.Which is closest to 800 × 92? (Round each number first.) (a) 7200 (b) 72000 (c) 720000 (d) 144000
  11. 11.Which is closest to 1793 ÷ 21? (a) 180 (b) 45 (c) 90 (d) 900
  12. 12.Round 42.33 to one decimal place. =
  13. 13.Round 39.73 to one decimal place. =
  14. 14.Which is closest to 703 × 42? (Round each number first.) (a) 2800 (b) 56000 (c) 28000 (d) 280000
  15. 15.Which is closest to 2797 ÷ 39? (a) 140 (b) 35 (c) 700 (d) 70
  16. 16.Which is closest to 1802 ÷ 29? (a) 30 (b) 60 (c) 120 (d) 600
  17. 17.Round 38.37 to one decimal place. =
  18. 18.Which is closest to 702 × 58? (Round each number first.) (a) 420000 (b) 4200 (c) 42000 (d) 84000
  19. 19.Round 6299 to the nearest thousand.
  20. 20.Round 24328 to the nearest ten.
  21. 21.Round 72.31 to one decimal place. =
  22. 22.Round 29.86 to one decimal place. =
  23. 23.Round 86.24 to one decimal place. =
  24. 24.Round 19475 to the nearest hundred.
  25. 25.Round 34.83 to one decimal place. =
  26. 26.Round 82.63 to one decimal place. =
  27. 27.Round 46.18 to one decimal place. =
  28. 28.Which is closest to 800 + 395 + 105? (a) 1200 (b) 1500 (c) 1400 (d) 1300
  29. 29.Which is closest to 995 ÷ 19? (a) 100 (b) 500 (c) 25 (d) 50
  30. 30.Which is closest to 498 × 21? (Round each number first.) (a) 10000 (b) 1000 (c) 100000 (d) 20000
  31. 31.Which is closest to 800 × 38? (Round each number first.) (a) 320000 (b) 32000 (c) 3200 (d) 64000
  32. 32.Which is closest to 699 × 80? (Round each number first.) (a) 5600 (b) 112000 (c) 56000 (d) 560000
  33. 33.Which is closest to 1999 ÷ 39? (a) 500 (b) 100 (c) 25 (d) 50
  34. 34.Which is closest to 802 × 59? (Round each number first.) (a) 480000 (b) 96000 (c) 48000 (d) 4800
  35. 35.Which is closest to 402 × 91? (Round each number first.) (a) 360000 (b) 3600 (c) 72000 (d) 36000
  36. 36.Which is closest to 3005 ÷ 51? (a) 600 (b) 120 (c) 30 (d) 60
  37. 37.Which is closest to 501 × 42? (Round each number first.) (a) 40000 (b) 200000 (c) 2000 (d) 20000
  38. 38.Round 55309 to the nearest thousand.
  39. 39.Which is closest to 1800 ÷ 19? (a) 45 (b) 900 (c) 180 (d) 90
  40. 40.Round 13.78 to one decimal place. =

Answer key

  1. 96460
  2. 80
  3. 44.2
  4. 4000
  5. 56000
  6. 95.5
  7. 48000
  8. 1600
  9. 84000
  10. 72000
  11. 90
  12. 42.3
  13. 39.7
  14. 28000
  15. 70
  16. 60
  17. 38.4
  18. 42000
  19. 6000
  20. 24330
  21. 72.3
  22. 29.9
  23. 86.2
  24. 19500
  25. 34.8
  26. 82.6
  27. 46.2
  28. 1300
  29. 50
  30. 10000
  31. 32000
  32. 56000
  33. 50
  34. 48000
  35. 36000
  36. 60
  37. 20000
  38. 55000
  39. 90
  40. 13.8

Free quantitative aptitude lessons, practice and worksheets at talentjr.in/quantitative-aptitude